It was intended to shoot .30 M1906 ammo with a flat based 150 grain bullet at 2700 fps. Any load in that neighbourhood will be fine.
Bolt actions do not have the supposed issues later M1 Rifles are reported to have. Just work up a load and you'll be fine.
I'd be thinking a 150 grain match bullet with IMR4064 myself. But the Hornady FMJ will do nicely too.
"...It shot M2 ball very well..." Exactly what was issued to the troopies who got 'em early in the U.S. for W.W. II and the odd Pattern 17 sent to the Brits under Lend/Lease.